在我们的SSD 购买(SSD buying)指南中，我们将为您提供所需的所有知识，以帮助您做出明智的购买决定。我们将帮助您找到正确的品牌，向您介绍不同的
SSD 技术(SSD technology)，并说明您应该为不同的SSD
类型花费多少。
希望在我们的指南结束时，您将了解有关购买SSD(SSDs)的所有信息。如果您今天不购买 SSD，请务必将此页面添加为书签，以便您
在决定购买 SSD 时准备好信息。(information ready)
为什么要购买 SSD？
这很简单——SSD(– SSDs)比标准硬盘驱动器快得多，而且通常不太可能发生故障。SSD 使用(SSDs use)充电的闪存单元。细胞永远记住它们的状态。您的 PC 将充电电池读取为 1，将未充电电池读取为二进制 0。
(Hard)另一方面，硬盘驱动器更像是带有移动部件的电唱机。真正的手臂必须按下磁盘才能物理写入。读取磁盘时，也必须这样做。
可以想象，活动部件不利于长寿。硬盘驱动器会随着时间的推移而变慢并完全失效。SSD(SSDs)
也可能会损坏，因为电池会被反复使用和重复使用，但预计它们的使用寿命会更长。
显然，寿命并不是(longevity isn)SSD(SSDs)的主要卖点(selling point)。一切都与速度有关。相比之下，高端 7200 (end 7200)RPM 驱动器(RPM drive)的读/写速度高达 210 MB/s read/write，而像Crucial CT250MX这样的(Crucial CT250MX)入门级(entry level)SSD的读/写速度高达 560/510 MB/s read/write。更高级的SSD(SSDs)可以运行得更快。
就现实世界的表现(world performance)而言，这意味着很多事情：
- 更快的启动时间
- 程序加载速度更快
- 减少(Less hitching)视频游戏中的卡顿和冻结
- 文件传输时间更快
- 程序并排运行更好
有哪些类型的 SSD？
如果我们暂时忽略不同的外形尺寸，那么现在有两种SSD技术在售。我们有典型的SATA 3 AHCI SSD，然后我们有NVME SSD。NVME和 AHCI(NVME and AHCI)都是用于与存储驱动器通信的软件“控制器”类型。
AHCI是一种更老、更过时的技术，而NVME则更新更快。因此，NVME SSD比SATA SSD贵得多。更复杂的是，只有在移动大文件时才能发挥NVME的全部潜力。(NVME)我们在SSD 技术(SSD technology)概述中解释了更多信息。
对于启动时间、游戏或轻度办公室工作，NVME和AHCI SSD的速度差异(speed difference)仅为几秒钟。对于移动大文件或编辑视频和照片，差异将非常明显。我们说话的速度快了近 7 倍。以下(Below)是不同文件传输(file transfer)速度和启动时间的概述。
Read/write
speed:
- 7200 RPM 高清 - 高达 210 MB/s
- SATA 3 SSD – 高达 550MB/s
- NVME SSD – 高达 3500MB/s
启动时间（估计）：(Boot
times (estimated):)
- 7200 RPM HD – 36 秒
- Sata 3 SSD 启动时间 – 9 秒
- NVME SSD – 6 秒
基于此视频(this video)的启动时间。
如您所见，从硬盘驱动器到SSD的(SSD)启动时间减少(boot time decrease)是巨大的。从SSD到NVME的跳跃非常小。但是，当涉及到较大的文件时， NVME在文件读/写速度方面仍然有很大的领先优势。
因此，考虑到这一点，如果您希望以最快的速度移动大文件，请选择NVME 。如果您不一定需要，您可以将相同的预算投入到更高容量的 SSD 驱动器中。
您应该为Sata 3 (Sata 3) SSD 驱动器(SSD Drive)支付多少费用
？
尽管 SSD(Whilst SSD)价格不断下降，但它们仍然比传统硬盘贵。您为每 GB 支付的金额取决于您选择的品牌和驱动器容量(drive capacity)。在撰写本文时，我们监测了亚马逊上不同(Amazon)SSD驱动器的价格，得出的结论是，每个不同容量驱动器(capacity drive)的平均价格如下所示。
- 1TB 硬盘：平均 135 美元
- 500GB 驱动器：平均 67 美元
- 250GB 驱动器：平均 44 美元
- 120GB 驱动器：平均 24 美元
您应该为
NVME 驱动器(NVME Drive)支付多少费用？
如前所述，NVME驱动器比标准SSD驱动器更昂贵。在购买之前，您还必须确保主板上有合适的M.2 连接器。(M.2 connector)M.2 连接器(M.2 connector)如下所示：
虽然不同品牌的标准SSD价格非常相似，但NVME驱动器的情况就不同了。例如，您可以为 1TB三星 970 (Samsung 970) PRO支付大约 250 美元，或者为 Crucial P1 1TB 支付 145 美元。
如果价格低于 200 美元，通常会有问题。以 P1 为例——它的最高速度是 2,000MB/s 读取和 1,500MB/s 写入。另一方面，三星 970 PRO 的读/写速度高达 3,500MB / s (Samsung 970) 。(PRO)
对于具有全速潜力(speed potential)的真正NVME SSD，您正在查看以下平均价格：
- 1TB 硬盘：平均 240 美元
- 500GB 驱动器：平均 130 美元
- 250GB 驱动器：平均 80 美元
- 120GB 驱动器：平均 50 美元
如果您看到速度明显较低的产品，请仔细阅读说明并在线阅读评论以了解原因。
哪些SSD品牌值得信赖？
从可靠品牌购买 SSD 很重要，因为要正确处理闪存可能是一件棘手的事情。如果担心寿命，您应该瞄准那些在制造持久驱动器方面有着良好记录的品牌。(track record)
一个有趣的实验(interesting experiment)表明，金士顿(Kingston)、三星(Samsung)和海盗船(Corsair)驱动器在写入 1000 TB 数据后仍然存在。请记住，这是很多数据。其他鲜为人知的品牌可能不会持续那么久。
选择驱动器时，您可以做的最好的事情是阅读客户对寿命的评论，并(longevity and research)在互联网上研究该品牌的潜在问题。归根结底，当您选择可信度较低的品牌而不是可靠的品牌时，稍微降低价格真的值得吗？
虽然这项研究是在典型的 AHCI SATA 3 驱动器上完成的，但我们相信在NVME 驱动器(NVME drive)上也会看到类似的结果。
概括
感谢您阅读我们的SSD 购买(SSD buying)指南。我们希望本指南提供的信息足以帮助您进行下一次购买。
还有其他关于SSD(SSDs)的问题吗？欢迎你给我发一条推文，我很乐意回复。享受！
SSD (Solid State Drive) Buying Guide for 2019
Іn our SSD buying guide, we’ll be arming you
wіth all of the knowledge you need to help make an informed purchasіng
decision. We’ll help steer you to the right brands, tеach you abоut different
SSD technology, and explain how much you shоuld be spending for diffеrent SSD
types.
Hopefully, by the end of our guide, you’ll
know everything there is to know about buying SSDs. If you’re not buying an SSD
today, make sure to bookmark this page so that you have the information ready
for when you do decide to purchase one.
Why Buy an SSD?
It’s quite straightforward – SSDs are far faster than standard hard drives and typically less likely to break down. SSDs use flash cells that are charged up with electricity. The cells remember their state forever. Your PC reads a charged cell as a 1 and a non-charged cell as a 0 in binary.
Hard drives, on the other hand, are more like record players with moving parts. A real arm has to press down on the disk to physically write into it. When reading the disk, the same must be done.
As you can imagine, moving parts are not good
for longevity. Hard drives can slow down over time and completely fail. SSDs
can break, too, as cells are used and reused over and over, but they are
predicted to last for far, far longer.
Obviously, longevity isn’t the main selling point for SSDs. It’s all about the speed. To compare, a high end 7200 RPM drive has a speed of up to 210 MB/s read/write, whilst an entry level SSD like the Crucial CT250MX has a speed of up to 560/510 MB/s read/write. More advanced SSDs can go much faster.
In terms of real world performance, this means
a number of things:
- Much faster boot up times
- Programs load faster
- Less hitching and freezes in video
games
- File transfer time is quicker
- Programs run better side by side
What Types of SSDs are There?
If we ignore the different form factors for a
second, there are two SSD technologies being sold right now. We have the
typical SATA 3 AHCI SSD and then we have the NVME SSD. Both NVME and AHCI are
types of software ‘controller’ used to communicate with storage drives.
AHCI is an older, more outdated technology, whilst NVME is far newer and much faster. As a result, an NVME SSD is considerably more expensive than a SATA SSD. To make things more complexing, the full potential of NVME is only reached if you move over large files. We explained more in our SSD technology overview.
For boot up times, gaming, or light office
work, the speed difference in an NVME and an AHCI SSD is just a few seconds.
For moving large files or editing videos and photos, the difference will be
very noticeable. We’re talking almost 7 times faster. Below is an overview of
different file transfer speeds and boot times.
Read/write
speed:
- 7200 RPM HD – up to 210 MB/s
- SATA 3 SSD – up to 550MB/s
- NVME SSD – up to 3500MB/s
Boot
times (estimated):
- 7200 RPM HD – 36 seconds
- Sata 3 SSD Boot time – 9 seconds
- NVME SSD – 6 seconds
Boot times based on this video.
As you can see, the boot time decrease from hard drive to SSD is huge. The jump from SSD to NVME is very small. However, the NVME still has a large lead in file read/write speeds when larger files are concerned.
So, with that in mind, go for an NVME if you
are after the fastest speed possible for moving large files. If you don’t
necessarily need that, you can put the same budget into a higher capacity SSD
drive.
How Much Should You Pay For a
Sata 3 SSD Drive?
Whilst SSD prices are constantly dropping, they are still more expensive than traditional hard drives. The amount you pay per GB will depend on the brand you choose and the drive capacity. At the time of writing, we monitored the prices of different SSD drives on Amazon and concluded that the average price to pay per different capacity drive is as shown below.
- 1TB drive: On average $135
- 500GB drive: On average $67
- 250GB drive: On average $44
- 120GB drive: On average $24
How Much Should You Pay For an
NVME Drive?
As mentioned earlier, NVME drives are more expensive than standard SSD drives. You must also make sure you have a suitable M.2 connector on your motherboard before you purchase one. An M.2 connector looks like this:
Whilst the standard SSD prices are very
similar across brands, it’s a different story with NVME drives. For example,
you can pay around $250 for the 1TB Samsung 970 PRO or $145 for the Crucial P1
1TB.
If prices are lower than $200, there’s usually
a catch. Take the P1 for example – its top speeds are 2,000MB/s read and
1,500MB/s write. The Samsung 970 PRO, on the other hand has speeds of up to
3,500MB/s read/write.
For a real NVME SSD with full speed potential,
you’re looking at the following average prices:
- 1TB drive: On average $240
- 500GB drive: On average $130
- 250GB drive: On average $80
- 120GB drive: On average $50
If you see a product with significantly lower
speeds, read through the description carefully and read reviews online to
understand why.
Which SSD Brands are Reliable?
Buying an SSD from a reliable brand is
important because flash memory can be a tricky thing to get right. If longevity
is a concern, you should aim for brands that have a proven track record of
manufacturing long lasting drives.
An interesting experiment showcased that Kingston, Samsung, and Corsair drives survived after writing 1000 TB of data. Keep in mind, that’s a lot of data. Other lesser known brands may not last quite as long.
The best thing you can do when choosing a drive is to read customer reviews on longevity and research the brand on the internet for potential issues. Ultimately, is a slight reduction in price really worth it when you may be choosing a lesser trusted brand over one that is reliable?
Whilst this study was done on typical AHCI
SATA 3 drives, we’re confident similar results would be seen on an NVME drive.
Summary
Thanks for reading our SSD buying guide. We
hope that this guide has been informative enough to help you make your next
purchase.
Have any more questions about SSDs? You’re welcome to send me a tweet and I’d be happy to respond. Enjoy!
